Code for c++.

Specify, design, and implement a classes called Statistician. After a statistician is initizlized, it can given a sequence of double numbers. Each number in the sequence is given to the statistician by activating a method called nextNumber. For example, we can declare a statistician called s and then give it the sequence of numbers 1.1, -2.4, 0.8 as shown here:

Statistician s = new Statistician();

s.nextNumber(1.1);

s.nextNumber(-2.4);

s.nextNumber(0.8);

After a sequence has been given to a statistician, there are various methods to obtain information about the sequence. Include methods that will provide the length of the sequence, the last number of the sequence, the sum of all the numbers in the sequence, the arithmetic mean of the numbers (i.e., the sum of the numbers divided by the length of the sequence), the smallest number in the sequence, and the largest number in the sequence.

Notice that the length and sum methods can be called at any time, even if there are no numbers in the sequence. In this case of an "empty" sequence, both length and sum will be zero. The other methods should return Double.NaN if they are called for an empty sequence:

Notes: Do not try to store the entire sequence. Instead, just store the necessary information about the sequence: What is the sequence length, what is the sum of the numbers in the sequence, and what are the last, smallest and largest numbers? Each of these pieces of information can be stored in a private instance variable that is updated whenever nextNumber is activated.

Overload the + operator to allow you to add two statisticians from the project. If s1 and s2 are two statisticians, then the result of s1+s2 should be a new statistician that behaves as if it had all of the numbers of s1 followed by all of the numbers of s2.

I have this code so far:

public class StatisticianDriver {public static void main(String[] args) {Statistician s=new Statistician(); System.out.println("Before anything entered"); System.out.println("mean= "+s.getMean()); System.out.println("Largest number= "+s.getBiggest()); System.out.println("Smallest number= "+s.getSmallest()); System.out.println("Last number entered= "+s.getLast()); System.out.println("Number of numbers entered= "+s.getLength()); s.nextNumber (1.1); s.nextNumber(-2.4); s.nextNumber (0.8); System.out.println(" After numbers entered"); System.out.println("sum= "+s.getSum()); System.out.println("mean= "+s.getMean()); System.out.println("Largest number= "+s.getBiggest()); System.out.println("Smallest number= "+s.getSmallest()); System.out.println("Last number entered= "+s.getLast()); System.out.println("Number of numbers entered= "+s.getLength()); } }

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public class Statistician {private double sum; private double small; private double big; private double last; private int count; public Statistician() {sum=0; count=0; }

public double getLength() {return count; }

public double getLast() {return last; } public double getSum() {return sum; } public double getMean() {return sum/count; } public double getSmallest() {return small; } public double getBiggest() {return big; } public void nextNumber(double n) {count++; if(count==1) {big=n; small=n; } else {if(n>big) big=n; if(n